Exo Terra Reptile UVB300 T5 VHO 54W 46" Tube | High Output UVB Lamp

The ET Reptile UVB300 T5 VHO is a 54W, 46-inch Very High Output fluorescent tube designed for reptiles that demand intense UVB exposure — species that bask in open or midday sun and occupy euphotic or heliophotic zones in the wild. Manufactured in Germany, this tube delivers a 14% UVB output rated for 12+ months of reliable UV performance, making it a serious option for keepers who won't compromise on photoperiod quality.

Built for High-UV Basking Species

Desert and savannah reptiles actively seek peak solar intensity, regulating both body temperature and UVB intake during basking. This tube is engineered to replicate that solar profile — combining strong UVA and UVB output with a well-balanced visible light spectrum. The intensity of UV exposure will vary with distance from the basking area, so positioning matters and should be calibrated to the species' requirements.

UVB That Goes to Work

• 14% UVB output — suited to heliophotic and euphotic zone species
• Promotes Vitamin D3 synthesis, supporting effective calcium absorption
• Helps guard against Metabolic Bone Disease (MBD)
• UVA emissions stimulate appetite, activity, and reproductive behaviour
• Unique phosphor blend replicates the solar UVB spectrum
• Superior UVB penetration compared to standard T8 and energy-saving alternatives

T5 VHO Format — Why It Matters

The Very High Output T5 format produces significantly more UV than conventional T8 tubes of equivalent length, and its enhanced UVB penetration means it remains effective in taller vivariums or enclosures fitted with mesh screens. This makes it a practical choice where distance between the tube and the basking surface is unavoidable.

Longevity and Output Consistency

Rated for 12 months or more of sustained UV output, this tube holds its performance across a full replacement cycle. UV degradation in cheaper lamps is a common but invisible welfare risk — this tube is built to maintain meaningful UVB levels throughout its rated lifespan.

For keepers housing heliophotic species such as uromastyx, bearded dragons, or tortoises, the ET Reptile UVB300 T5 VHO 54W delivers the UV intensity these animals need to thrive — without requiring compromise on enclosure height or screen type.